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It turns out that having to live in the same house with brothers and sisters is good practice for marriage.

A new study out of Ohio State University found that people with siblings are less likely to divorce than only-children. And the more siblings, the better. Each additional brother or sister a person has, up to about seven, reduces the likelihood of divorce by 2%, the study found.

"We expected that if you had any siblings at all, that would give you the experience with personal relationships that would help you in marriage," sociology professor Donna Bobbitt-Zeher said in a press release. "But we found that the real story appears to be how family dynamics change incrementally with the addition of each sibling. Having more siblings means more experience dealing with others, and that seems to provide additional help in dealing with a marriage relationship as an adult."

The study is based on interviews with 57,000 U.S. adults between 1972 and 2012.